Jonathan Warner

@jaxbot

Developer, UCF student, maker of things, technophile.

Surface Pro 2 Battery Report after 3 Months

2-09-14

I purchased my Surface Pro 2 in the middle of November 2013. Since then, I've used it as my daily driver, replacing my desktop. In addition, I had the December firmware bug, which prevented the device from sleeping correctly, and caused it to overheat and drain to 0% a couple of times. I tried to get it swapped out because of this, but the MS store rep refused, saying the device was fine. I'll keep tabs on this and see if he was right or not.

After 3 months, my battery report looks like this. You can grab this by running powercfg /batteryreport from a command prompt. PowerShell doesn't seem to work, for whatever reason.

The system reports I've used 70 cycles, and my full charge capacity is 2,000 mWh lower than the design capacity. I've heard LiOn batteries wear the most in the beginning, but a month ago at the MS store, the full charge capacity was listed as higher than the design, something the rep pointed out to me as a sign that the device was fine. I'll take it as a sign that the firmware was junked.

I honestly do not know enough about batteries to know if this is good or bad, but the battery life does not feel like it's decreased significantly, so I'll take it as it is for now, and keep tabs on it every month.

Full battery report below.

Battery report

COMPUTER NAME

KOMALI

SYSTEM PRODUCT NAME

Microsoft Corporation Surface Pro 2

BIOS

2.04.0350 12/18/2013

OS BUILD

9600.16452.amd64fre.winblue_gdr.131030-1505

PLATFORM ROLE

Slate

CONNECTED STANDBY

Not supported

REPORT TIME

2014-02-09 10:46:15

Installed batteries

Information about each currently installed battery

BATTERY
1

NAME

X863568

MANUFACTURER

LGC_LGC

SERIAL NUMBER

1F11

CHEMISTRY

LION

DESIGN CAPACITY

42,002 mWh

FULL CHARGE CAPACITY

40,027 mWh

CYCLE COUNT

70

Recent usage

Power states over the last 3 days

START TIME

STATE

SOURCE

CAPACITY REMAINING

2014-02-06 11:25:55

Active

Battery

71 %

28,727 mWh

13:19:53

Suspended

44 %

17,538 mWh

13:20:32

Active

Battery

44 %

17,471 mWh

13:51:52

Suspended

39 %

15,488 mWh

15:14:34

Active

Battery

38 %

15,414 mWh

15:17:33

Suspended

38 %

15,207 mWh

15:22:00

Active

Battery

37 %

15,089 mWh

15:31:12

Suspended

35 %

14,127 mWh

15:32:42

Active

Battery

35 %

14,045 mWh

15:33:58

Suspended

34 %

13,897 mWh

18:24:32

Active

AC

60 %

23,939 mWh

19:10:03

Active

Battery

92 %

36,726 mWh

19:59:00

Suspended

76 %

30,658 mWh

20:13:55

Active

Battery

72 %

28,882 mWh

20:30:44

Suspended

69 %

27,602 mWh

20:33:21

Active

Battery

68 %

27,476 mWh

21:26:35

Active

AC

52 %

20,742 mWh

22:20:36

Active

Battery

91 %

36,519 mWh

23:13:07

Suspended

75 %

30,066 mWh

2014-02-07 06:44:15

Active

Battery

76 %

30,532 mWh

07:28:50

Active

AC

59 %

23,880 mWh

08:06:14

Active

Battery

88 %

35,476 mWh

08:07:05

Suspended

87 %

35,224 mWh

08:48:00

Active

Battery

88 %

35,076 mWh

09:14:02

Suspended

82 %

32,871 mWh

12:39:34

Active

Battery

82 %

32,693 mWh

14:04:27

Suspended

60 %

23,924 mWh

14:05:06

Active

Battery

60 %

23,865 mWh

15:19:34

Suspended

45 %

18,123 mWh

19:00:47

Active

AC

46 %

18,663 mWh

19:58:53

Active

Battery

91 %

36,637 mWh

20:42:29

Suspended

74 %

30,044 mWh

20:58:34

Active

Battery

74 %

29,815 mWh

21:02:38

Suspended

72 %

29,208 mWh

2014-02-08 08:09:00

Active

Battery

72 %

29,015 mWh

09:53:20

Active

AC

36 %

14,519 mWh

10:57:39

Suspended

87 %

35,009 mWh

13:10:58

Active

Battery

87 %

34,869 mWh

13:24:51

Suspended

82 %

32,664 mWh

14:07:19

Active

Battery

81 %

32,390 mWh

15:37:05

Active

AC

46 %

18,330 mWh

16:47:42

Suspended

95 %

38,147 mWh

21:04:44

Active

Battery

94 %

37,673 mWh

22:56:47

Active

AC

50 %

20,217 mWh

23:39:35

Suspended

85 %

33,944 mWh

2014-02-09 09:40:51

Active

Battery

85 %

33,862 mWh

10:46:00

Report generated

Battery

58 %

23,414 mWh

Battery usage

Battery drains over the last 3 days

START TIME

STATE

DURATION

ENERGY DRAINED

2014-02-06 11:25:55

Active

1:53:58

28 %

11,189 mWh

13:20:32

Active

0:31:19

5 %

1,983 mWh

15:14:34

Active

0:02:59

1 %

207 mWh

15:22:00

Active

0:09:11

2 %

962 mWh

15:32:42

Active

0:01:15

-

148 mWh

19:10:03

Active

0:48:56

15 %

6,068 mWh

20:13:55

Active

0:16:48

3 %

1,280 mWh

20:33:21

Active

0:53:14

17 %

6,734 mWh

22:20:36

Active

0:52:30

16 %

6,453 mWh

2014-02-07 06:44:15

Active

0:44:34

16 %

6,652 mWh

08:06:14

Active

0:00:51

1 %

252 mWh

08:48:00

Active

0:26:01

6 %

2,205 mWh

12:39:34

Active

1:24:53

22 %

8,769 mWh

14:05:06

Active

1:14:27

14 %

5,742 mWh

19:58:53

Active

0:43:35

16 %

6,593 mWh

20:58:34

Active

0:04:04

2 %

607 mWh

2014-02-08 08:09:00

Active

1:44:19

36 %

14,496 mWh

13:10:58

Active

0:13:52

6 %

2,205 mWh

14:07:19

Active

1:29:45

35 %

14,060 mWh

21:04:44

Active

1:52:03

44 %

17,456 mWh

2014-02-09 09:40:51

Active

1:05:08

26 %

10,448 mWh

Usage history

History of system usage on AC and battery

BATTERY DURATION

AC DURATION

PERIOD

ACTIVE

CONNECTED STANDBY

ACTIVE

CONNECTED STANDBY

2013-11-17
- 2013-11-24

22:34:44

-

7:01:06

-

2013-11-24
- 2013-12-01

42:58:38

-

10:41:46

-

2013-12-01
- 2013-12-08

20:47:09

-

7:03:28

-

2013-12-08
- 2013-12-15

9:32:03

-

0:43:14

-

2013-12-15
- 2013-12-22

10:09:05

-

-

-

2013-12-22
- 2013-12-29

24:07:09

-

2:26:24

-

2013-12-29
- 2014-01-05

18:59:00

-

6:21:04

-

2014-01-05
- 2014-01-12

28:58:00

-

9:35:39

-

2014-01-12
- 2014-01-19

36:51:46

-

7:54:16

-

2014-01-19
- 2014-01-26

35:21:11

-

12:49:28

-

2014-01-27

4:58:24

-

1:33:03

-

2014-01-28

4:40:56

-

1:39:59

-

2014-01-29

6:12:05

-

2:05:17

-

2014-01-30

4:28:07

-

1:52:29

-

2014-01-31

6:26:54

-

1:13:04

-

2014-02-01

3:51:16

-

1:24:06

-

2014-02-02

4:00:29

-

3:10:34

-

2014-02-03

5:02:12

-

2:18:47

-

2014-02-04

2:12:32

-

1:39:38

-

2014-02-05

5:57:25

-

1:59:50

-

2014-02-06

5:31:14

-

1:39:29

-

2014-02-07

4:29:46

-

1:35:28

-

2014-02-08

5:06:22

-

1:33:09

-

Battery capacity history

Charge capacity history of the system's batteries

PERIOD

FULL CHARGE CAPACITY

DESIGN CAPACITY

2013-11-17
- 2013-11-24

41,907 mWh

42,002 mWh

2013-11-24
- 2013-12-01

41,746 mWh

42,002 mWh

2013-12-01
- 2013-12-08

41,411 mWh

42,002 mWh

2013-12-08
- 2013-12-15

41,351 mWh

42,002 mWh

2013-12-15
- 2013-12-22

41,303 mWh

42,002 mWh

2013-12-22
- 2013-12-29

41,067 mWh

42,002 mWh

2013-12-29
- 2014-01-05

41,508 mWh

42,002 mWh

2014-01-05
- 2014-01-12

41,362 mWh

42,002 mWh

2014-01-12
- 2014-01-19

41,179 mWh

42,002 mWh

2014-01-19
- 2014-01-26

41,219 mWh

42,002 mWh

2014-01-27

41,112 mWh

42,002 mWh

2014-01-28

40,781 mWh

42,002 mWh

2014-01-29

40,526 mWh

42,002 mWh

2014-01-30

40,244 mWh

42,002 mWh

2014-01-31

40,230 mWh

42,002 mWh

2014-02-01

39,985 mWh

42,002 mWh

2014-02-02

40,113 mWh

42,002 mWh

2014-02-03

40,316 mWh

42,002 mWh

2014-02-04

39,987 mWh

42,002 mWh

2014-02-05

40,330 mWh

42,002 mWh

2014-02-06

40,268 mWh

42,002 mWh

2014-02-07

40,179 mWh

42,002 mWh

2014-02-08

40,216 mWh

42,002 mWh

Battery life estimates

Battery life estimates based on observed drains

AT FULL CHARGE

AT DESIGN CAPACITY

PERIOD

ACTIVE

CONNECTED STANDBY

ACTIVE

CONNECTED STANDBY

2013-11-17
- 2013-11-24

6:23:35

-

6:24:27

-

2013-11-24
- 2013-12-01

6:19:22

-

6:21:42

-

2013-12-01
- 2013-12-08

5:44:14

-

5:49:08

-

2013-12-08
- 2013-12-15

6:37:23

-

6:43:38

-

2013-12-15
- 2013-12-22

7:09:25

-

7:16:41

-

2013-12-22
- 2013-12-29

6:29:22

-

6:38:14

-

2013-12-29
- 2014-01-05

5:20:04

-

5:23:52

-

2014-01-05
- 2014-01-12

6:02:35

-

6:08:11

-

2014-01-12
- 2014-01-19

6:06:15

-

6:13:35

-

2014-01-19
- 2014-01-26

5:11:54

-

5:17:49

-

2014-01-27

5:19:28

-

5:26:23

-

2014-01-28

5:00:17

-

5:09:16

-

2014-01-29

5:59:31

-

6:12:36

-

2014-01-30

5:15:03

-

5:28:49

-

2014-01-31

5:24:07

-

5:38:23

-

2014-02-01

4:39:49

-

4:53:56

-

2014-02-02

4:40:59

-

4:54:13

-

2014-02-03

4:42:39

-

4:54:28

-

2014-02-04

4:32:11

-

4:45:54

-

2014-02-05

6:32:43

-

6:49:00

-

2014-02-06

5:54:27

-

6:09:43

-

2014-02-07

5:55:10

-

6:11:17

-

2014-02-08

4:21:52

-

4:33:30

-

Current estimate of battery life based on all observed drains since OS install